▸ noun: a change into someone or something completely different, or the process by which this happens
▸ noun: the act of changing in form or shape or appearance
▸ noun: (genetics) modification of a cell or bacterium by the uptake and incorporation of exogenous DNA?
▸ noun: a rule describing the conversion of one syntactic structure into another related syntactic structure
▸ noun: a qualitative change
▸ noun: (mathematics) a function that changes the position or direction of the axes of a coordinate system